[Code of Federal Regulations] [Title 10, Volume 3] [Revised as of January 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 10CFR431.25] [Page 311-312] TITLE 10--ENERGY CHAPTER II--DEPARTMENT OF ENERGY PART 431_ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND INDUSTRIAL EQUIPMENT--Table of Contents Subpart B_Electric Motors Sec. 431.25 Energy conservation standards and effective dates. (a) Each electric motor manufactured (alone or as a component of another piece of equipment) after October 24, 1997, or in the case of an electric motor which requires listing or certification by a nationally recognized safety testing laboratory, after October 24, 1999, shall have a nominal full load efficiency of not less than the following: ---------------------------------------------------------------------------------------------------------------- Nominal full load efficiency ----------------------------------------------------------------------------- Motor horsepower/ standard Open motors (number of poles) Enclosed motors (number of poles) kilowatt equivalent ----------------------------------------------------------------------------- 6 4 2 6 4 2 ---------------------------------------------------------------------------------------------------------------- 1 / .75........................... 80.0 82.5 ........... 80.0 82.5 75.5 1.5 / 1.1......................... 84.0 84.0 82.5 85.5 84.0 82.5 2 / 1.5........................... 85.5 84.0 84.0 86.5 84.0 84.0 3 / 2.2........................... 86.5 86.5 84.0 87.5 87.5 85.5 [[Page 312]] 5 / 3.7........................... 87.5 87.5 85.5 87.5 87.5 87.5 7.5 / 5.5......................... 88.5 88.5 87.5 89.5 89.5 88.5 10 / 7.5.......................... 90.2 89.5 88.5 89.5 89.5 89.5 15 / 11........................... 90.2 91.0 89.5 90.2 91.0 90.2 20 / 15........................... 91.0 91.0 90.2 90.2 91.0 90.2 25 / 18.5......................... 91.7 91.7 91.0 91.7 92.4 91.0 30 / 22........................... 92.4 92.4 91.0 91.7 92.4 91.0 40 / 30........................... 93.0 93.0 91.7 93.0 93.0 91.7 50 / 37........................... 93.0 93.0 92.4 93.0 93.0 92.4 60 / 45........................... 93.6 93.6 93.0 93.6 93.6 93.0 75 / 55........................... 93.6 94.1 93.0 93.6 94.1 93.0 100 / 75.......................... 94.1 94.1 93.0 94.1 94.5 93.6 125 / 90.......................... 94.1 94.5 93.6 94.1 94.5 94.5 150 / 110......................... 94.5 95.0 93.6 95.0 95.0 94.5 200 / 150......................... 94.5 95.0 94.5 95.0 95.0 95.0 ---------------------------------------------------------------------------------------------------------------- (b) For purposes of determining the required minimum nominal full load efficiency of an electric motor that has a horsepower or kilowatt rating between two horsepowers or kilowattages listed consecutively in paragraph (a) of this section, each such motor shall be deemed to have a horsepower or kilowatt rating that is listed in paragraph (a) of this section. The rating that the motor is deemed to have shall be determined as follows: (1) A horsepower at or above the midpoint between the two consecutive horsepowers shall be rounded up to the higher of the two horsepowers; (2) A horsepower below the midpoint between the two consecutive horsepowers shall be rounded down to the lower of the two horsepowers, or (3) A kilowatt rating shall be directly converted from kilowatts to horsepower using the formula, 1 kilowatt = (1 / 0.746) horsepower, without calculating beyond three significant decimal places, and the resulting horsepower shall be rounded in accordance with paragraphs (b)(1) or (b)(2) of this section, whichever applies. (c) This section does not apply to definite purpose motors, special purpose motors, and those motors exempted by the Secretary.